I'm trying to type someone I know -- but I'm stuck with some inconsistencies. Been able to narrow him down to two likely types. So, how would one go about differentiating an ESFj (leading with ) from an ESFp-Fe ??? What would constitute a few key differences?

By quadra, he seems more likely Alpha (= ESFj)
But overall type description/portrait seems more ESFp (=Gamma)

is most obvious; appears to be his weakest function (perhaps PoLR).